Abstract
New lines are observed in the infrared spectrum of a crystal due to unit-cell doubling at a spin-Peierls transition (in NaV2O5). The change in the shape of the spectral lines at the spin-Peierls transition is recorded. A contour characteristic of a Fano resonance is observed above the transition temperature T sp and the standard symmetric contour is observed below T sp . We attribute this effect to the opening of a gap in the magnetic-excitation spectrum at the spin-Peierls transition.
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Pis’ma Zh. Éksp. Teor. Fiz. 65, No. 9, 711–716 (10 May 1997)
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Popova, M.N., Sushkov, A.B., Vasil’ev, A.N. et al. Appearance of new lines and change in line shape in the IR spectrum of a NaV2O5 single crystal at a spin-Peierls transition. Jetp Lett. 65, 743–748 (1997). https://doi.org/10.1134/1.567420
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DOI: https://doi.org/10.1134/1.567420